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元素周期律指出:元素的性质随着原子序数的递增而呈周期性的变化。它概括了元素性质的变化规律及其与原子结构的关系,是学习研究物质结构和元素化合物知识的主要理论依据。一、知识归纳1.结合元素周期表,元素周期律可以表述为:随着原子序数的增加,元素的性质呈周期性的递变规律:在同一周期中,元素的最外层电子数从左到右逐渐增多。在同一周期中,元素的金属性从左到右逐渐减,非金属性
The periodic law of elements states that the nature of the element changes cyclically with increasing atomic number. It summarizes the variation of elemental properties and its relationship with atomic structure, and is the main theoretical basis for studying and studying the material structure and the knowledge of elemental compounds. First, the knowledge induction 1 combined with the periodic table, the elemental periodic law can be expressed as: With the atomic number increases, the nature of the elements showed a periodic pattern of gradual change: in the same cycle, the elements of the outermost electrons from the left To the right gradually increased. In the same cycle, the elemental properties of metal decrease from left to right, non-metallic